forked from OSchip/llvm-project
[MSVC2015] dllexport for defaulted special class members
Clang doesn't dllexport defaulted special member function defaulted inside class but does it if they defaulted outside class. MSVC doesn't make any distinction where they were defaulted. Also MSVC 2013 and 2015 export different set of members. MSVC2015 doesn't emit trivial defaulted x-tors but does emit copy assign operator. Differential revision: http://reviews.llvm.org/D20422 llvm-svn: 270535
This commit is contained in:
Dmitry Polukhin
parent
70595aae64
commit
6194d9f5d8
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@ -4811,11 +4811,17 @@ void Sema::checkClassLevelDLLAttribute(CXXRecordDecl *Class) {
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// MSVC versions before 2015 don't export the move assignment operators
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// and move constructor, so don't attempt to import/export them if
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// we have a definition.
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auto *CXXC = dyn_cast<CXXConstructorDecl>(MD);
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auto *Ctor = dyn_cast<CXXConstructorDecl>(MD);
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if ((MD->isMoveAssignmentOperator() ||
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(CXXC && CXXC->isMoveConstructor())) &&
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(Ctor && Ctor->isMoveConstructor())) &&
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!getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015))
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continue;
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// MSVC2015 doesn't export trivial defaulted x-tor but copy assign
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// operator is exported anyway.
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if (getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) &&
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(Ctor || isa<CXXDestructorDecl>(MD)) && MD->isTrivial())
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continue;
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}
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}
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@ -4889,6 +4895,33 @@ void Sema::propagateDLLAttrToBaseClassTemplate(
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}
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}
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static void DefineImplicitSpecialMember(Sema &S, CXXMethodDecl *MD,
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SourceLocation DefaultLoc) {
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switch (S.getSpecialMember(MD)) {
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case Sema::CXXDefaultConstructor:
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S.DefineImplicitDefaultConstructor(DefaultLoc,
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cast<CXXConstructorDecl>(MD));
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break;
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case Sema::CXXCopyConstructor:
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S.DefineImplicitCopyConstructor(DefaultLoc, cast<CXXConstructorDecl>(MD));
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break;
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case Sema::CXXCopyAssignment:
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S.DefineImplicitCopyAssignment(DefaultLoc, MD);
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break;
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case Sema::CXXDestructor:
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S.DefineImplicitDestructor(DefaultLoc, cast<CXXDestructorDecl>(MD));
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break;
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case Sema::CXXMoveConstructor:
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S.DefineImplicitMoveConstructor(DefaultLoc, cast<CXXConstructorDecl>(MD));
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break;
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case Sema::CXXMoveAssignment:
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S.DefineImplicitMoveAssignment(DefaultLoc, MD);
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break;
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case Sema::CXXInvalid:
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llvm_unreachable("Invalid special member.");
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}
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}
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/// \brief Perform semantic checks on a class definition that has been
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/// completing, introducing implicitly-declared members, checking for
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/// abstract types, etc.
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@ -4984,8 +5017,8 @@ void Sema::CheckCompletedCXXClass(CXXRecordDecl *Record) {
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// For an explicitly defaulted or deleted special member, we defer
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// determining triviality until the class is complete. That time is now!
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CXXSpecialMember CSM = getSpecialMember(M);
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if (!M->isImplicit() && !M->isUserProvided()) {
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CXXSpecialMember CSM = getSpecialMember(M);
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if (CSM != CXXInvalid) {
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M->setTrivial(SpecialMemberIsTrivial(M, CSM));
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@ -4993,6 +5026,20 @@ void Sema::CheckCompletedCXXClass(CXXRecordDecl *Record) {
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Record->finishedDefaultedOrDeletedMember(M);
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}
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}
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if (!M->isInvalidDecl() && M->isExplicitlyDefaulted() &&
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M->hasAttr<DLLExportAttr>()) {
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if (getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) &&
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M->isTrivial() &&
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(CSM == CXXDefaultConstructor || CSM == CXXCopyConstructor ||
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CSM == CXXDestructor))
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M->dropAttr<DLLExportAttr>();
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if (M->hasAttr<DLLExportAttr>()) {
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DefineImplicitSpecialMember(*this, M, M->getLocation());
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ActOnFinishInlineFunctionDef(M);
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}
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}
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}
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}
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@ -13063,32 +13110,8 @@ void Sema::SetDeclDefaulted(Decl *Dcl, SourceLocation DefaultLoc) {
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CheckExplicitlyDefaultedSpecialMember(MD);
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if (MD->isInvalidDecl())
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return;
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switch (Member) {
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case CXXDefaultConstructor:
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DefineImplicitDefaultConstructor(DefaultLoc,
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cast<CXXConstructorDecl>(MD));
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break;
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case CXXCopyConstructor:
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DefineImplicitCopyConstructor(DefaultLoc, cast<CXXConstructorDecl>(MD));
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break;
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case CXXCopyAssignment:
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DefineImplicitCopyAssignment(DefaultLoc, MD);
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break;
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case CXXDestructor:
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DefineImplicitDestructor(DefaultLoc, cast<CXXDestructorDecl>(MD));
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break;
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case CXXMoveConstructor:
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DefineImplicitMoveConstructor(DefaultLoc, cast<CXXConstructorDecl>(MD));
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break;
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case CXXMoveAssignment:
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DefineImplicitMoveAssignment(DefaultLoc, MD);
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break;
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case CXXInvalid:
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llvm_unreachable("Invalid special member.");
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}
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if (!MD->isInvalidDecl())
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DefineImplicitSpecialMember(*this, MD, DefaultLoc);
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} else {
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Diag(DefaultLoc, diag::err_default_special_members);
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}
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@ -1,5 +1,7 @@
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// RUN: %clang_cc1 -triple i686-windows-msvc -fms-compatibility -emit-llvm -std=c++1y -O0 -o - %s | FileCheck --check-prefix=MSC --check-prefix=M32 %s
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// RUN: %clang_cc1 -triple x86_64-windows-msvc -fms-compatibility -emit-llvm -std=c++1y -O0 -o - %s | FileCheck --check-prefix=MSC --check-prefix=M64 %s
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// RUN: %clang_cc1 -triple i686-windows-msvc -fms-compatibility -fms-compatibility-version=18 -emit-llvm -std=c++1y -O0 -o - %s | FileCheck --check-prefix=MSC --check-prefix=M32 %s
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// RUN: %clang_cc1 -triple x86_64-windows-msvc -fms-compatibility -fms-compatibility-version=18 -emit-llvm -std=c++1y -O0 -o - %s | FileCheck --check-prefix=MSC --check-prefix=M64 %s
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// RUN: %clang_cc1 -triple i686-windows-msvc -fms-compatibility -fms-compatibility-version=19 -emit-llvm -std=c++1y -O0 -o - %s | FileCheck --check-prefix=M32VS2015 %s
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// RUN: %clang_cc1 -triple x86_64-windows-msvc -fms-compatibility -fms-compatibility-version=19 -emit-llvm -std=c++1y -O0 -o - %s | FileCheck --check-prefix=M64VS2015 %s
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// RUN: %clang_cc1 -triple i686-windows-gnu -emit-llvm -std=c++1y -O0 -o - %s | FileCheck --check-prefix=GNU --check-prefix=G32 %s
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// RUN: %clang_cc1 -triple x86_64-windows-gnu -emit-llvm -std=c++1y -O0 -o - %s | FileCheck --check-prefix=GNU --check-prefix=G64 %s
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@ -427,6 +429,32 @@ __declspec(dllexport) ExportDefaultedDefs::ExportDefaultedDefs(ExportDefaultedDe
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ExportDefaultedDefs& ExportDefaultedDefs::operator=(ExportDefaultedDefs&&) = default;
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// Export defaulted member function definitions declared inside class.
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struct ExportDefaultedInclassDefs {
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__declspec(dllexport) ExportDefaultedInclassDefs() = default;
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// M32VS2013-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QAE@XZ"(%struct.ExportDefaultedInclassDefs* returned %this)
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// M64VS2013-DAG: define weak_odr dllexport %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QEAA@XZ"(%struct.ExportDefaultedInclassDefs* returned %this)
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// M32VS2015-NOT: define weak_odr dllexport x86_thiscallcc %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QAE@XZ"(%struct.ExportDefaultedInclassDefs* returned %this)
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// M64VS2015-NOT: define weak_odr dllexport %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QEAA@XZ"(%struct.ExportDefaultedInclassDefs* returned %this)
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__declspec(dllexport) ~ExportDefaultedInclassDefs() = default;
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// M32VS2013-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??1ExportDefaultedInclassDefs@@QAE@XZ"(%struct.ExportDefaultedInclassDefs* %this)
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// M64VS2013-DAG: define weak_odr dllexport void @"\01??1ExportDefaultedInclassDefs@@QEAA@XZ"(%struct.ExportDefaultedInclassDefs* %this)
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// M32VS2015-NOT: define weak_odr dllexport x86_thiscallcc void @"\01??1ExportDefaultedInclassDefs@@QAE@XZ"(%struct.ExportDefaultedInclassDefs* %this)
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// M64VS2015-NOT: define weak_odr dllexport void @"\01??1ExportDefaultedInclassDefs@@QEAA@XZ"(%struct.ExportDefaultedInclassDefs* %this)
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__declspec(dllexport) ExportDefaultedInclassDefs(const ExportDefaultedInclassDefs&) = default;
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// M32VS2013-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QAE@ABU0@@Z"(%struct.ExportDefaultedInclassDefs* returned %this, %struct.ExportDefaultedInclassDefs* dereferenceable({{[0-9]+}}))
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// M64VS2013-DAG: define weak_odr dllexport %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QEAA@AEBU0@@Z"(%struct.ExportDefaultedInclassDefs* returned %this, %struct.ExportDefaultedInclassDefs* dereferenceable({{[0-9]+}}))
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// M32VS2015-NOT: define weak_odr dllexport x86_thiscallcc %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QAE@ABU0@@Z"(%struct.ExportDefaultedInclassDefs* returned %this, %struct.ExportDefaultedInclassDefs* dereferenceable({{[0-9]+}}))
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// M64VS2015-NOT: define weak_odr dllexport %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QEAA@AEBU0@@Z"(%struct.ExportDefaultedInclassDefs* returned %this, %struct.ExportDefaultedInclassDefs* dereferenceable({{[0-9]+}}))
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__declspec(dllexport) ExportDefaultedInclassDefs& operator=(const ExportDefaultedInclassDefs&) = default;
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// M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportDefaultedInclassDefs* @"\01??4ExportDefaultedInclassDefs@@QAEAAU0@ABU0@@Z"(%struct.ExportDefaultedInclassDefs* %this, %struct.ExportDefaultedInclassDefs* dereferenceable({{[0-9]+}}))
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// M64-DAG: define weak_odr dllexport dereferenceable({{[0-9]+}}) %struct.ExportDefaultedInclassDefs* @"\01??4ExportDefaultedInclassDefs@@QEAAAEAU0@AEBU0@@Z"(%struct.ExportDefaultedInclassDefs* %this, %struct.ExportDefaultedInclassDefs* dereferenceable({{[0-9]+}}))
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};
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// Export allocation functions.
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struct ExportAlloc {
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__declspec(dllexport) void* operator new(__SIZE_TYPE__);
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@ -1,8 +1,8 @@
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// RUN: %clang_cc1 -triple i686-windows-msvc -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O1 -mconstructor-aliases -disable-llvm-optzns -o - %s -w -fms-compatibility-version=19.00 | FileCheck --check-prefix=MSC --check-prefix=M32 -check-prefix=MSVC2015 %s
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// RUN: %clang_cc1 -triple i686-windows-msvc -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O1 -mconstructor-aliases -disable-llvm-optzns -o - %s -w -fms-compatibility-version=18.00 | FileCheck --check-prefix=MSC --check-prefix=M32 -check-prefix=MSVC2013 %s
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// RUN: %clang_cc1 -triple i686-windows-msvc -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O1 -mconstructor-aliases -disable-llvm-optzns -o - %s -w -fms-compatibility-version=19.00 | FileCheck --check-prefix=MSC --check-prefix=M32 -check-prefix=MSVC2015 -check-prefix=M32MSVC2015 %s
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// RUN: %clang_cc1 -triple i686-windows-msvc -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O1 -mconstructor-aliases -disable-llvm-optzns -o - %s -w -fms-compatibility-version=18.00 | FileCheck --check-prefix=MSC --check-prefix=M32 -check-prefix=MSVC2013 -check-prefix=M32MSVC2013 %s
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// RUN: %clang_cc1 -triple x86_64-windows-msvc -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s -w -fms-compatibility-version=19.00 | FileCheck --check-prefix=MSC --check-prefix=M64 -check-prefix=MSVC2015 %s
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// RUN: %clang_cc1 -triple x86_64-windows-msvc -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s -w -fms-compatibility-version=18.00 | FileCheck --check-prefix=MSC --check-prefix=M64 -check-prefix=MSVC2013 %s
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// RUN: %clang_cc1 -triple x86_64-windows-msvc -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s -w -fms-compatibility-version=19.00 | FileCheck --check-prefix=MSC --check-prefix=M64 -check-prefix=MSVC2015 -check-prefix=M64MSVC2015 %s
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// RUN: %clang_cc1 -triple x86_64-windows-msvc -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s -w -fms-compatibility-version=18.00 | FileCheck --check-prefix=MSC --check-prefix=M64 -check-prefix=MSVC2013 -check-prefix=M64MSVC2013 %s
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// RUN: %clang_cc1 -triple i686-windows-gnu -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s -w | FileCheck --check-prefix=GNU --check-prefix=G32 %s
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// RUN: %clang_cc1 -triple x86_64-windows-gnu -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s -w | FileCheck --check-prefix=GNU --check-prefix=G64 %s
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@ -561,7 +561,7 @@ struct __declspec(dllexport) T {
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// Explicitly defaulted copy constructur:
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T(const T&) = default;
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// M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.T* @"\01??0T@@QAE@ABU0@@Z"
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// M32MSVC2013-DAG: define weak_odr dllexport x86_thiscallcc %struct.T* @"\01??0T@@QAE@ABU0@@Z"
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void a() {}
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// M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?a@T@@QAEXXZ"
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@ -647,9 +647,34 @@ namespace UseDtorAlias {
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struct __declspec(dllexport) DefaultedCtorsDtors {
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DefaultedCtorsDtors() = default;
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// M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.DefaultedCtorsDtors* @"\01??0DefaultedCtorsDtors@@QAE@XZ"
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// M32MSVC2013-DAG: define weak_odr dllexport x86_thiscallcc %struct.DefaultedCtorsDtors* @"\01??0DefaultedCtorsDtors@@QAE@XZ"
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~DefaultedCtorsDtors() = default;
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// M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??1DefaultedCtorsDtors@@QAE@XZ"
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// M32MSVC2013-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??1DefaultedCtorsDtors@@QAE@XZ"
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};
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// Export defaulted member function definitions declared inside class.
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struct __declspec(dllexport) ExportDefaultedInclassDefs {
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ExportDefaultedInclassDefs() = default;
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// M32VS2013-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QAE@XZ"(%struct.ExportDefaultedInclassDefs* returned %this)
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// M64VS2013-DAG: define weak_odr dllexport %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QEAA@XZ"(%struct.ExportDefaultedInclassDefs* returned %this)
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// M32VS2015-NOT: define weak_odr dllexport x86_thiscallcc %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QAE@XZ"(%struct.ExportDefaultedInclassDefs* returned %this)
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// M64VS2015-NOT: define weak_odr dllexport %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QEAA@XZ"(%struct.ExportDefaultedInclassDefs* returned %this)
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~ExportDefaultedInclassDefs() = default;
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// M32VS2013-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??1ExportDefaultedInclassDefs@@QAE@XZ"(%struct.ExportDefaultedInclassDefs* %this)
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// M64VS2013-DAG: define weak_odr dllexport void @"\01??1ExportDefaultedInclassDefs@@QEAA@XZ"(%struct.ExportDefaultedInclassDefs* %this)
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// M32VS2015-NOT: define weak_odr dllexport x86_thiscallcc void @"\01??1ExportDefaultedInclassDefs@@QAE@XZ"(%struct.ExportDefaultedInclassDefs* %this)
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// M64VS2015-NOT: define weak_odr dllexport void @"\01??1ExportDefaultedInclassDefs@@QEAA@XZ"(%struct.ExportDefaultedInclassDefs* %this)
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ExportDefaultedInclassDefs(const ExportDefaultedInclassDefs&) = default;
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// M32VS2013-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QAE@ABU0@@Z"(%struct.ExportDefaultedInclassDefs* returned %this, %struct.ExportDefaultedInclassDefs* dereferenceable({{[0-9]+}}))
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// M64VS2013-DAG: define weak_odr dllexport %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QEAA@AEBU0@@Z"(%struct.ExportDefaultedInclassDefs* returned %this, %struct.ExportDefaultedInclassDefs* dereferenceable({{[0-9]+}}))
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// M32VS2015-NOT: define weak_odr dllexport x86_thiscallcc %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QAE@ABU0@@Z"(%struct.ExportDefaultedInclassDefs* returned %this, %struct.ExportDefaultedInclassDefs* dereferenceable({{[0-9]+}}))
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// M64VS2015-NOT: define weak_odr dllexport %struct.ExportDefaultedInclassDefs* @"\01??0ExportDefaultedInclassDefs@@QEAA@AEBU0@@Z"(%struct.ExportDefaultedInclassDefs* returned %this, %struct.ExportDefaultedInclassDefs* dereferenceable({{[0-9]+}}))
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ExportDefaultedInclassDefs& operator=(const ExportDefaultedInclassDefs&) = default;
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// M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.ExportDefaultedInclassDefs* @"\01??4ExportDefaultedInclassDefs@@QAEAAU0@ABU0@@Z"(%struct.ExportDefaultedInclassDefs* %this, %struct.ExportDefaultedInclassDefs* dereferenceable({{[0-9]+}}))
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// M64-DAG: define weak_odr dllexport dereferenceable({{[0-9]+}}) %struct.ExportDefaultedInclassDefs* @"\01??4ExportDefaultedInclassDefs@@QEAAAEAU0@AEBU0@@Z"(%struct.ExportDefaultedInclassDefs* %this, %struct.ExportDefaultedInclassDefs* dereferenceable({{[0-9]+}}))
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};
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namespace ReferencedInlineMethodInNestedClass {
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@ -721,7 +746,7 @@ template <typename T> struct ExplicitInstConstexprMembers {
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// M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExplicitInstConstexprMembers* @"\01??0?$ExplicitInstConstexprMembers@X@@QAE@XZ"
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ExplicitInstConstexprMembers(const ExplicitInstConstexprMembers&) = default;
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// M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExplicitInstConstexprMembers* @"\01??0?$ExplicitInstConstexprMembers@X@@QAE@ABU0@@Z"
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// M32MSVC2013-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExplicitInstConstexprMembers* @"\01??0?$ExplicitInstConstexprMembers@X@@QAE@ABU0@@Z"
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constexpr int f() const { return 42; }
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// M32-DAG: define weak_odr dllexport x86_thiscallcc i32 @"\01?f@?$ExplicitInstConstexprMembers@X@@QBEHXZ"
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